RHS Infection Control Practice Questions
A quarter of the RHS exam: keeping sensors, holders, the x-ray unit and the operatory free of cross-contamination while you take images.
Ten RHS questions on infection prevention and control, with an explanation after each answer. Your first attempt is free.
Or take the full 75-question RHS practice exam- 40 original Infection Prevention and Control questions, each answer explained
- 25% of the RHS exam, about 19 of 75 questions
- Domain III of DANB’s RHS outline, effective March 12, 2025
An intraoral receptor holder made of plastic that is labeled single-use should be:
What the Infection Prevention and Control domain covers
- Breakdown and setup of the treatment room for radiography
- Barriers on sensors, PSP plates, the tubehead, the control panel and the exposure button
- Clinical contact surfaces and how they are cleaned and disinfected
- Critical, semicritical and noncritical items used when taking images, and how each is processed
- Hand hygiene, selecting, putting on and taking off PPE, and preventing cross-contamination
This list is our own summary. DANB publishes the full outline, references and acronym list in its RHS Exam Outline and References.
Drill infection prevention and control, then sit the full exam
Ten RHS questions on infection prevention and control, with an explanation after each answer. Your first attempt is free.
Or take the full 75-question RHS practice examIdeas the questions test most
- Receptor holders touch mucous membranes, so they are semicritical and heat sterilized (or single use).
- Digital sensors that cannot be heat sterilized get an FDA-cleared barrier, then cleaning and intermediate-level disinfection after each patient.
- Open a used PSP envelope with gloves and drop the plate out without touching it, so the scanner stays clean.
- Barriers go on before the patient is seated and come off with gloved hands.
- Gloves come off first; hand hygiene follows every glove removal.
Start the free Infection Prevention and Control drill · RHS mixed drill · Full 75-question RHS practice exam
Common questions
How should a digital sensor be disinfected between patients?
The CDC says sensors should be heat sterilized or high-level disinfected when possible. When the sensor cannot tolerate that, cover it with an FDA-cleared barrier and, after removing the barrier, clean and disinfect it with an EPA-registered intermediate-level (tuberculocidal) disinfectant, following the manufacturer’s instructions.
Is infection control on both the RHS and ICE exams?
Yes. RHS covers infection prevention for radiography (25% of that exam). The ICE exam covers dental infection control as a whole, including instrument processing and OSHA standards.
Which guidelines does this domain follow?
DANB’s outline names standard precautions according to the ADA, CDC and OSHA, and lists CDC’s 2003 dental guidelines, its 2016 Summary of Infection Prevention Practices in Dental Settings and OSHA’s Bloodborne Pathogens and Hazard Communication standards among its references.
Ten RHS questions on infection prevention and control, with an explanation after each answer. Your first attempt is free.
Or take the full 75-question RHS practice examOther RHS domains
Domains, weights and format from DANB, checked November 2026: DANB: Radiation Health and Safety (RHS) exam · DANB RHS Exam Outline and References (effective 03/12/2025).
Original independent practice, written from DANB’s public exam outlines. Not affiliated with or endorsed by the Dental Assisting National Board (DANB). DANB, RHS, ICE, CDA and Certified Dental Assistant are marks of the Dental Assisting National Board, Inc.